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Grinding noise/sensation

Tiny
TYLER HUBLER
  • MEMBER
  • 2010 FORD F-150
  • 6.2L
  • V8
  • 4WD
  • AUTOMATIC
  • 66,000 MILES
My truck is the Raptor model.
Okay this is sort of hard to explain but here goes:

I live in a very hilly area, think back country mountain roads with long straight stretches. When cruising about thirty to sixty mph, on a flat road everything is fine. But when the elevation changes, and I hit the bottom of a hill and start to go back up in elevation (when suspension becomes slightly compressed, more weight is being applied) there is a grinding noise/sensation that is felt throughout the vehicle.

It also occurs when coasting down a hill at just about any speed, both in drive and in neutral. Applying brakes makes no difference, but I have noticed a slight vibration in the steering wheel when applying the brakes as well, not sure if this is related or not. Braking is otherwise fine during all other driving conditions.

I have replaced both front wheel bearing hub assemblies and IWE's.
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Tuesday, May 30th, 2017 AT 9:04 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
There is a TSB on driveshaft for that but it has a build date before 1/26/12 and you have to look for separation on center support. See picture, it may not be it but it can throw a vibration like a bad u joint.
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Tuesday, May 30th, 2017 AT 9:44 AM
Tiny
TYLER HUBLER
  • MEMBER
  • 2 POSTS
Thanks HMAC, it is more of a rubbing noise than a vibration. Almost like a tire rubbing, but I see no signs of wear anywhere near the tires, does not really seem like metal on metal but very well could be.
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Tuesday, May 30th, 2017 AT 10:09 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Well it is hard for us to try to diagnose a problem like that. Check dust shields hitting rotor or an engine shield rubbing against motor drive line. Also, check by axle for something rubbing.
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Tuesday, May 30th, 2017 AT 11:58 AM

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